Subaru Near Infrared Coronagraphic Images of T Tauri

• Published in: Publications of the Astronomical Society of Japan 2006-04, Vol.58 (2), p.375-382
• Main Authors: Mayama, Satoshi, Tamura, Motohide, Hayashi, Masahiko, Itoh, Yoichi, Fukagawa, Misato, Suto, Hiroshi, Ishii, Miki, Murakawa, Koji, Oasa, Yumiko, Hayashi, Saeko S., Yamashita, Takuya, Morino, Junichi, Oya, Shin, Naoi, Takahiro, Pyo, Tae-Soo, Nishikawa, Takayuki, Kudo, Tomoyuki, Usuda, Tomonori, Ando, Hiroyasu, Miyama, Shoken M., Kaifu, Norio
• Format: Article
• Language: English
• ISSN: 0004-6264; 2053-051X
• DOI: 10.1093/pasj/58.2.375

High angular resolution near-infrared (JHK) adaptive optics images of T Tau were obtained with the infrared camera Coronagraphic Imager with Adaptive Optics (CIAO) mounted on the 8.2 m Subaru Telescope in 2002 and 2004. The images resolve a complex circumstellar structure around a multiple system. We resolved T Tau Sa and Sb as well as T Tau N and S. The estimated orbit of T Tau Sb indicates that it is probably bound to T Tau Sa. The $K$ band flux of T Tau S decreased by $\sim 1.7 \,\mathrm{Jy}$ in 2002 November compared with that in 2001 mainly because T Tau Sa became fainter. The arc-like ridge detected in our near-infrared images is consistent with what is seen at visible wavelengths, supporting the interpretation in previous studies that the arc is part of the cavity wall seen relatively pole-on. Halo emission is detected out to $\sim 2^{\prime\prime}$ from T Tau N. This may be light scattered off the common envelope surrounding the T Tauri multiple system.